单项选择 适中0.65 引用2 组卷239
Every means _________, but none proved __________.
| A．have tried; a success |
| B．have been tried; successful |
| C．has tried; to be successful |
| D．has been tried; successful |
2015·湖南长沙·二模
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He was really________ about his wife’s operation, walking ________in front of the operation room.
| A．worrries; back and forth | B．worried; now and then |
| C．worried; back and forth | D．worries; now and then |
As long as we persist in spreading scientific knowledge among the masses，all the strange beliefs are ________ to go out of our life.
| A．necessary | B．important | C．difficult | D．bound |
While ____the dog, you should take care not to ____. Otherwise, it may be dangerous to strangers.
| A．walking; get loose | B．walk; be loose |
| C．walking for; get it loose | D．training; get it run |
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